From: Guennadi Liakhovetski Date: Fri, 20 Jan 2012 23:41:28 +0000 (+0100) Subject: mmc: sh_mmcif: fix late delayed work initialisation X-Git-Tag: Ubuntu-goldfish-3.4.0-4.27~921^2~3 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=5ba85d95cae3837665241e6df12aea83b6bf7c32;p=mirror_ubuntu-zesty-kernel.git mmc: sh_mmcif: fix late delayed work initialisation If the driver is loaded with a card in the slot, mmc_add_host() will schedule an immediate card-detection work, which will start IO and wait for command completion. Usually the kernel first returns to the sh_mmcif probe function, lets it finish and only then schedules the rescan work. But sometimes, expecially under heavy system load, the work will be scheduled immediately before returning to the probe method. In this case it is important for the driver to be fully prepared for IO. For sh_mmcif this means, that also the timeout work has to be initialised before calling mmc_add_host(). It is also better to prepare interrupts beforehand. Besides, since mmc_add_host() does card-detection itself, there is no need to do it again immediately afterwards. Signed-off-by: Guennadi Liakhovetski Signed-off-by: Chris Ball --- diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c index f5d8b53be333..352d4797865b 100644 --- a/drivers/mmc/host/sh_mmcif.c +++ b/drivers/mmc/host/sh_mmcif.c @@ -1327,7 +1327,7 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev) if (ret < 0) goto clean_up2; - mmc_add_host(mmc); + INIT_DELAYED_WORK(&host->timeout_work, mmcif_timeout_work); sh_mmcif_writel(host->addr, MMCIF_CE_INT_MASK, MASK_ALL); @@ -1338,22 +1338,24 @@ static int __devinit sh_mmcif_probe(struct platform_device *pdev) } ret = request_threaded_irq(irq[1], sh_mmcif_intr, sh_mmcif_irqt, 0, "sh_mmc:int", host); if (ret) { - free_irq(irq[0], host); dev_err(&pdev->dev, "request_irq error (sh_mmc:int)\n"); - goto clean_up3; + goto clean_up4; } - INIT_DELAYED_WORK(&host->timeout_work, mmcif_timeout_work); - - mmc_detect_change(host->mmc, 0); + ret = mmc_add_host(mmc); + if (ret < 0) + goto clean_up5; dev_info(&pdev->dev, "driver version %s\n", DRIVER_VERSION); dev_dbg(&pdev->dev, "chip ver H'%04x\n", sh_mmcif_readl(host->addr, MMCIF_CE_VERSION) & 0x0000ffff); return ret; +clean_up5: + free_irq(irq[1], host); +clean_up4: + free_irq(irq[0], host); clean_up3: - mmc_remove_host(mmc); pm_runtime_suspend(&pdev->dev); clean_up2: pm_runtime_disable(&pdev->dev);